TPS62130/40/50 - PVIN and AVIN pins

Original Question: PVIN and AVIN Pin in TPS621x0


on the datasheet of the TPS62130/40/50 is written that PVIN and AVIN need to be connected together. Is it the only way to operate?

What happens if I connect two different voltages (like in other regulators) in order to save energy ? (e.g. PVIN = 10V,  AVIN = 3.3V)

Verified Answer: RE: PVIN and AVIN Pin in TPS621x0 

The part was not designed to operate with different potentials on AVIN and PVIN.  They must be connected to the same source, per the datasheet.